'form
Private Sub Command1_Click()
Hook
End Sub

Private Sub Form_Unload(Cancel As Integer)
NonHook
End Sub

'module
Option Explicit
Declare Function SetWindowsHookEx Lib "user32" Alias "SetWindowsHookExA" _
 (ByVal idHook As Long, _
 ByVal lpfn As Long, _
 ByVal hmod As Long, _
 ByVal dwThreadId As Long) As Long
 
Declare Function UnhookWindowsHookEx Lib "user32" _
(ByVal hHook As Long) As Long

Declare Function LoadLibrary Lib "kernel32" Alias "LoadLibraryA" _
(ByVal lpLibFileName As String) As Long

Declare Function GetProcAddress Lib "kernel32" _
 (ByVal hModule As Long, ByVal lpProcName As String) As Long
Declare Function FreeLibrary Lib "kernel32" (ByVal hLibModule As Long) As Long
Public Const WH_CBT = 5
Public Const WH_SHELL As Long = 10
Public hHook As Long

Public Sub Hook()
Dim hHookDLL As Long
Dim pHookFunction As Long
hHookDLL = LoadLibrary("hk.dll")
If hHookDLL = 0 Then
 End
 End If
 pHookFunction = GetProcAddress(hHookDLL, "HookFunction")
 hHook = SetWindowsHookEx(WH_CBT, pHookFunction, hHookDLL, 0)
 FreeLibrary (hHookDLL)
End Sub

Public Sub NonHook()
Dim suc As Long
If hHook <> 0 Then
 suc = UnhookWindowsHookEx(hHook)
  hHook = 0
  End If

End Sub

'dll
Private Declare Function CallNextHookEx Lib "user32" _
 (ByVal hHook As Long, _
 ByVal ncode As Long, _
 ByVal wParam As Long, _
 lParam As Any) As Long
 Private Const HCBT_ACTIVATE = 1
 Private Const HCBT_DESTROYWND As Long = 1
 Private Declare Function GetForegroundWindow Lib "user32" () As Long
 Private Declare Function GetWindowTextLength Lib "user32" Alias "GetWindowTextLengthA" (ByVal hwnd As Long) As Long
 Private Const HC_ACTION As Long = 0
 Private Const HCBT_CREATEWND As Long = 3
 Private Const WH_SHELL As Long = 10
 Private Const HSHELL_WINDOWCREATED& = 1
 Private Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hwnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long
 Public Type CWPSTRUCT
    lParam As Long
    wParam As Long
    message As Long
    hwnd As Long
End Type
Private Const WM_CREATE As Long = &H1

 
Public Function HookFunction(ByVal iCode As Long, ByVal wParam As Long, lParam As CWPSTRUCT) As Long

Dim FrmHandle As Long, lcaption As String


  If iCode < 0 Then
  HookFunction = CallNextHookEx(hHook, iCode, wParam, ByVal lParam)
  Exit Function
  End If
  
  Dim Class As String, cl As Long
  Class = Space(64)
  cl = GetClassName(lParam.hwnd, Class, 64)
  If StrComp(Class, "MSBLWindowClass") = 0 Then
  MsgBox ("siii")
  End If
  
  
  HookFunction = CallNextHookEx(hHook, iCode, wParam, ByVal lParam)
 End Function

'in a form
Private Sub Form_load()
Hook.lpfn = Adresspackajing(AddressOf Interceptor) 'whao! un puntero a una funcion..hay k hoderse XD
Hook.idHook = WH_CBT 

Hook.hmod = App.hInstance 
Dim find As Long, fi As Long
Dim a As Long

a = Shell("notepad.exe")
find = FindWindow("Notepad", vbNullString)
Hook.dwThreadId = GetWindowThreadProcessId(find, fi)
Hook.hhooKRET = SetWindowsHookEx(Hook.idHook, Hook.lpfn, Hook.hmod, Hook.dwThreadId)  
End Sub

Public Function Adresspackajing(ByVal Add As Long) As Long
Adresspackajing = Add
End Function

'in a module
Declare Function GetWindowThreadProcessId Lib "user32" Alias "GetWindowThreadProcessId" (ByVal hwnd As Long, lpdwProcessId As Long) As Long
Public Declare Function SetWindowsHookEx Lib "user32" Alias "SetWindowsHookExA" (ByVal idHook As Long, ByVal lpfn As Long, ByVal hmod As Long, ByVal dwThreadId As Long) As Long
Private Type T_Hookguay
        idHook As Long
        lpfn As Long
        hmod As Long
        dwThreadId As Long
        hhooKRET As Long
End Type
Public Hook As T_Hookguay
Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Declare Function CallNextHookEx Lib "user32" (ByVal hHook As Long, ByVal nCode As Long, ByVal wParam As Long, lParam As Any) As Long
Public Const WH_CBT = 5
Public Const HCBT_DESTROYWND As Long = 4


Public Function Interceptor(ByVal lMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
    If lMsg < 0 Then
        Interceptor = CallNextHookEx(Hook.hhooKRET, lMsg, wParam, lParam)
    Else
    Select Case lMsg
    Case HCBT_DESTROYWND
    MsgBox ("siiii")
    End Select
        Interceptor = CallNextHookEx(Hook.hhooKRET, lMsg, wParam, lParam)
    End If
End Function

'DLL activeX
'En un modulo 
Public Declare Function SetWindowsHookEx Lib "user32" Alias "SetWindowsHookExA" (ByVal idHook As Long, ByVal lpfn As Long, ByVal hmod As Long, ByVal dwThreadId As Long) As Long
Public Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hwnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long
Public Declare Function GetCurrentThreadId Lib "kernel32" () As Long
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As Long, ByVal lpWindowName As Long) As Long
Private Declare Function GetCurrentProcessId Lib "kernel32" () As Long
Private Declare Function GetWindowThreadProcessId Lib "user32" (ByVal hwnd As Long, lpdwProcessId As Long) As Long

Public Type T_Hookguay
        idHook As Long
        lpfn As Long
        hmod As Long
        dwThreadId As Long
        hhooKRET As Long
End Type
Public Hook As T_Hookguay 'ale punterete a la extructura
Public Declare Function GetWindowLong Lib "user32" Alias _
         "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) _
         As Long
Declare Function CallNextHookEx Lib "user32" (ByVal hHook As Long, ByVal nCode As Long, ByVal wParam As Long, lParam As Any) As Long
Declare Function GetKeyState Lib "user32" (ByVal nVirtKey As Long) As Integer
Declare Function UnhookWindowsHookEx Lib "user32" (ByVal hHook As Long) As Long
Public Const GWL_HINSTANCE = (-6)
Public Const WH_CBT = 5
Public Const HCBT_ACTIVATE = 5
Const HCBT_CREATEWND As Long = 3
Public Const WM_KEYFIRST = &H100
Public Const WH_KEYBOARD = 2
Public Const VK_SHIFT = &H10


Public Function Formas(ByVal modd As Long) As Long
Dim pp As Long
Hook.lpfn = Adresspackajing(AddressOf Interceptor) 'whao! un puntero a una funcion..hay k hoderse XD
Hook.idHook = WH_CBT 'podiamos haberlo pasado directamente ..pero asi esto os puede servir para
pp = FindWindow(ByVal 0&, ByVal 0&)
 Hook.hmod = GetWindowLong(pp, GWL_HINSTANCE)
Hook.dwThreadId = Shell("notepad.exe")
Hook.hhooKRET = SetWindowsHookEx(Hook.idHook, Hook.lpfn, Hook.hmod, hook.dwThreadId)
End Function

Public Function Interceptor(ByVal lMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Dim lpClassName As String, r As Long, rr As Long, ra As Long
ra = GetWindowThreadProcessId(wParam, rr)
    If Hook.hhooKRET < 0 Then
        'call the next hook
        Interceptor = CallNextHookEx(Hook.hhooKRET, lMsg, wParam, ByVal lParam)
    Else
    
    If rr = Hook.dwThreadId Then
    MsgBox ("siiiiiiiiiii")
    End If
           Interceptor = CallNextHookEx(Hook.hhooKRET, lMsg, wParam, ByVal lParam)
    End If
End Function

Public Function Adresspackajing(ByVal Add As Long) As Long
Adresspackajing = Add
End Function

Option Explicit
' Las declaraciones de las funciones de la DLL
Declare Function Formas Lib "pr.dll" (ByVal modd As Long) As Long

'form Exe de donde llamamos a la Dll
Private Sub Form_Load()
Dim p As Long
p = Formas()
End Sub